文中所研究的战略性贸易政策为保护进口的关税措施,比较了不同关税水平下的总国民福利,论证了进口保护的合理性,以及最佳关税率的存在性。
The paper discusses and compares the different effects on gross national welfare of different tariff on iron imports , and also proves the existence of optimal tariff .